CountPairCrossover3.hh

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//
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/// @file   core/scoring/etable/count_pair/CountPairCrossover3.hh
/// @brief  Count pair for residue pairs connected with one bond, where the
/// crossover from excluding to counting atom pair interactions is at 3 bonds.
/// @author Andrew Leaver-Fay (leaverfa@email.unc.edu)


#ifndef INCLUDED_core_scoring_etable_count_pair_CountPairCrossover3_hh
#define INCLUDED_core_scoring_etable_count_pair_CountPairCrossover3_hh

#include <core/scoring/etable/count_pair/CountPairFunction.hh>

#include <core/types.hh>


namespace core {
namespace scoring {
namespace etable {
namespace count_pair {

class CountPairCrossover3 : public CountPairFunction
{
public:
  public:
  typedef CountPairFunction parent;

public:

  virtual ~CountPairCrossover3();

  ///@brief function used by derived classes and associated classes (like the trie's count pair hierarchy)
  static
  inline
  bool
  count_at_path_distance(
    Size const path_distance,
    Real & weight
  )
  {
    if ( path_distance < 3 ) return false;
    else if ( path_distance > 3 ) return true;

    weight = cp_half; return true;
  }

};

} // namespace count_pair
} // namespace etable
} // namespace scoring
} // namespace core

#endif